function aneSpeed() {
	if (ane.spd > 0.1) {
		for (var j = 0; j < 2; j++) {
			if (fishes.boids[j].act > 50) {
				ane.spd -= 0.001 * time;
				fishes.boids[j].act = 0;
			}
		}
	}
}

function colorBack() {//随时间回退

	if (backG.r1 >= 17 && backG.r1 <= 250) {
		var div = 2000 * 256;
		
		backG.r1 -= 228 / div;
		backG.g1 -= 103 / div;
		backG.b1 -= 9 / div;
		backG.r2 -= 51 / div;
		backG.g2 -= 47 / div;
		backG.b2 -= -88 / div;
	}

}